/*
 * Copyright (c) 2016-present. Drakeet Xu
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.drakeet.multitype.sample.bilibili

import android.graphics.Rect
import android.view.View
import androidx.recyclerview.widget.GridLayoutManager.SpanSizeLookup
import androidx.recyclerview.widget.RecyclerView

/**
 * @author Drakeet Xu
 */
class PostItemDecoration(private val space: Int, private val spanSizeLookup: SpanSizeLookup) : RecyclerView.ItemDecoration() {

  override fun getItemOffsets(outRect: Rect, view: View, parent: RecyclerView, state: RecyclerView.State) {
    val position = parent.getChildLayoutPosition(view)
    if (spanSizeLookup.getSpanSize(position) == 1) {
      outRect.left = space
      if (position % 2 == 0) {
        outRect.right = space
      }
    }
  }
}
